class X:
	func foo():
		var x = 1 is int is bool
		var y = 1 is int is bool is bool is bool is bool is bool is bool is bool is bool is bool is bool is bool is bool is bool
		print([1,2.1] is Array[int])
		var z = 1 is not int
		var z1 = 1 is not int is not bool is not bool is not bool is not bool is not bool is not bool is not bool is not bool is not bool
